Created attachment 178620 [details] [review]
Patch to remove the GstPhotography defaults from gst-camerabin-test

Don't set any default values for source element GstPhotography interface
settings in gst-camerabin-test tool, source elements should have sane defaults themselves.

Also, setting scene-mode is tricky as it is a superset of other GstPhotography
settings. This might cause problem with defaults e.g. setting scene-mode to
'night' may configure flash-mode as 'on' by definition, and after that
we don't want to override this flash-mode setting with gst-camerabin-test default
value. Moreover, user needs have an option to set scene-mode first and then force
some individual setting to a different value from the scene-mode definition.